package com.rongdong.parkingcapture.common;


import com.rongdong.parkingcapture.constant.Constants;

import java.io.Serializable;
import java.util.HashMap;

/**
 * 响应信息主体
 *
 */
public class R<T> implements Serializable {
    private static final long serialVersionUID = 1L;

    /**
     * 成功
     */
    public static final int SUCCESS = Constants.SUCCESS;

    /**
     * 参数错误
     */
    public static final int FAIL_CODE = Constants.PARAM_FAIL;

    /**
     * 任务存在，启动失败
     */
    public static final int START_FAIL = Constants.START_FAIL;

    /**
     * 服务内部错误
     */
    public static final int SERVICE_ERROS = Constants.SERVICE_ERROS;

    private int code;

    private String msg;

    private T data;

    public static <T> R<T> ok() {
        return restResult(null, SUCCESS, null);
    }

    public static <T> R<T> ok(T data) {
        return restResult(data, SUCCESS, null);
    }

    public static <T> R<T> ok(T data, String msg) {
        return restResult(data, SUCCESS, msg);
    }

    public static <T> R<T> fail() {
        return restResult(null, FAIL_CODE, null);
    }

    /**
     * 如果没有传data，则返回一个空对象{}
     */
    public static <T> R<T> fail(String msg) {
        return restResult((T) new HashMap<>(), FAIL_CODE, msg);
    }

    public static <T> R<T> fail(T data) {
        return restResult(data, FAIL_CODE, null);
    }

    public static <T> R<T> fail(T data, String msg) {
        return restResult(data, FAIL_CODE, msg);
    }

    public static <T> R<T> fail(int code, String msg) {
        return restResult(null, code, msg);
    }

    private static <T> R<T> restResult(T data, int code, String msg) {
        R<T> apiResult = new R<>();
        apiResult.setCode(code);
        apiResult.setData(data);
        apiResult.setMsg(msg);
        return apiResult;
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }

    public static <T> Boolean isError(R<T> ret) {
        return !isSuccess(ret);
    }

    public static <T> Boolean isSuccess(R<T> ret) {
        return R.SUCCESS == ret.getCode();
    }

    @Override
    public String toString() {
        return "R{code=" + code + ", msg='" + msg + '\'' + ", data=" + data + '}';
    }
}
